Pascal (Lazarus/Delphi)

Attach a File to a Multipart MIME Entity

Demonstrates the Chilkat Mime.AppendPartFromFile method, which reads a local file, creates an attachment part, and appends it. The only argument is the file path; the content headers are chosen from the filename extension.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This is the one-call way to add an attachment: Chilkat reads the file, infers its Content-Type from the extension, base64-encodes binary content, and appends it as a child part — typically inside a multipart/mixed. It is the building block behind adding attachments to an email, saving you from constructing the part and setting its headers by hand.

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Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Mime;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  mime: TMime;
  bodyPart: TMime;

begin
  success := False;

  //  Demonstrates the Mime.AppendPartFromFile method, which reads a local file, creates an attachment
  //  part, and appends it.  The only argument is the file path; the content headers are chosen from
  //  the filename extension.

  mime := TMime.Create;
  success := mime.NewMultipartMixed();
  if (success = False) then
    begin
      WriteLn(mime.LastErrorText);
      Exit;
    end;

  //  A message body part.
  bodyPart := TMime.Create;
  success := bodyPart.SetBodyFromPlainText('Please see the attached files.');
  if (success = False) then
    begin
      WriteLn(bodyPart.LastErrorText);
      Exit;
    end;
  success := mime.AppendPart(bodyPart);
  if (success = False) then
    begin
      WriteLn(mime.LastErrorText);
      Exit;
    end;

  //  Attach files directly.
  success := mime.AppendPartFromFile('qa_data/report.pdf');
  if (success = False) then
    begin
      WriteLn(mime.LastErrorText);
      Exit;
    end;
  success := mime.AppendPartFromFile('qa_data/photo.jpg');
  if (success = False) then
    begin
      WriteLn(mime.LastErrorText);
      Exit;
    end;

  WriteLn('Number of parts: ' + mime.NumParts);


  mime.Free;
  bodyPart.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.